58 research outputs found
Recommended from our members
EFFECT OF FLUCTUATIONS ON GLOBAL ANALYSIS OF FLUID DYNAMICAL CALCULATIONS FOR HIGH-ENERGY NUCLEAR COLLISIONS
No full textPENGEMBANGAN SOAL MATEMATIKA MODEL PISA LEVEL 6 MENGGUNAKAN KONTEKS LAHAN BASAH
No full textPengembangan yang dilakukan dalam penelitian ini bertujuan untuk menghasilkan instrumen soal matematika model PISA level 6 dengan konteks lahan basah yang valid serta mengukur tingkat keterbacaan dan kepraktisan instrumen tersebut. Peneliti mengambil sampel siswa Kelas IX G di SMPN 1 Banjarmasin dalam penelitian ini. Peneliti menggunakan metode riset pengembangan atau development research tipe formative evaluation sebagai metode penelitian. Tahapan dalam riset ini diantaranya tahap preliminary terdiri dari persiapan serta tahap formative evaluation yang terdiri dari evaluasi pribadi, uji pakar ahli, one-to-one dan small group. Penelitian ini belum dilakukan sampai tahap field test yaitu pengujian terhadap kemampuan siswa. Metode analisis yang digunakan adalah analisis deskriptif dengan merevisi berdasarkan catatan validator serta saran dan komentar dari siswa. Sarana yang digunakan untuk mendapatkan data pada penelitian ini berupa lembar validasi dan lembar angket siswa. Hasil Penelitian ini menghasilkan tingkat kevalidan dengan kategori valid adalah sebesar 3,4948. Hasil analisis tingkat kepraktisan soal sangat praktis dengan skor 3,52
Search for supersymmetry with a dominant R-parity violating LLĒ coupling in e+e- collisions at centre-of-mass energies of 130 GeV to 172 GeV
No full textcomplete author list: Barate R.; Buskulic D.; Decamp D.; Ghez P.; Goy C.; Lees J.; Lucotte A.; Minard M.; Nief J.; Pietrzyk B.; Boix G.; Casado M.; Chmeissani M.; Crespo J.; Delfino M.; Fernandez E.; Fernandez-Bosman M.; Garrido L.; Grauges E.; Juste A.; Martinez M.; Merino G.; Miquel R.; Mir L.; Morawitz P.; Park I.; Pascual A.; Perlas J.; Riu I.; Sanchez F.; Colaleo A.; Creanza D.; de Palma M.; Gelao G.; Iaselli G.; Maggi G.; Maggi M.; Marinelli N.; Nuzzo S.; Ranieri A.; Raso G.; Ruggieri F.; Selvaggi G.; Silvestris L.; Tempesta P.; Tricomi A.; Zito G.; Huang X.; Lin J.; Ouyang Q.; Wang T.; Xie Y.; Xu R.; Xue S.; Zhang J.; Zhang L.; Zhao W.; Abbaneo D.; Alemany R.; Becker U.; Bright-Thomas P.; Casper D.; Cattaneo M.; Cerutti F.; Ciulli V.; Dissertori G.; Drevermann H.; Forty R.; Frank M.; Gianotti F.; Hagelberg R.; Hansen J.; Harvey J.; Janot P.; Jost B.; Lehraus I.; Mato P.; Minten A.; Moneta L.; Pacheco A.; Pusztaszeri J.; Ranjard F.; Rolandi L.; Rousseau D.; Schlatter D.; Schmitt M.; Schneider O.; Tejessy W.; Teubert F.; Tomalin I.; Vreeswijk M.; Wachsmuth H.; Wagner A.; Ajaltouni Z.; Badaud F.; Chazelle G.; Deschamps O.; Falvard A.; Ferdi C.; Gay P.; Guicheney C.; Henrard P.; Jousset J.; Michel B.; Monteil S.; Montret J.; Pallin D.; Perret P.; Podlyski F.; Proriol J.; Rosnet P.; Fearnley T.; Hansen J.; Hansen J.; Hansen P.; Nilsson B.; Rensch B.; Wäänänen A.; Daskalakis G.; Kyriakis A.; Markou C.; Simopoulou E.; Vayaki A.; Blondel A.; Brient J.; Machefert F.; Rouge A.; Rumpf M.; Valassi A.; Videau H.; Boccali T.; Focardi E.; Parrini G.; Zachariadou K.; Cavanaugh R.; Corden M.; Georgiopoulos C.; Huehn T.; Jaffe D.; Antonelli A.; Bencivenni G.; Bologna G.; Bossi F.; Campana P.; Capon G.; Chiarella V.; Felici G.; Laurelli P.; Mannocchi G.; Murtas F.; Murtas G.; Passalacqua L.; Pepe-Altarelli M.; Curtis L.; Dorris S.; Halley A.; Lynch J.; Negus P.; O'Shea V.; Raine C.; Scarr J.; Smith K.; Teixeira-Dias P.; Thompson A.; Thomson E.; Thomson F.; Ward J.; Buchmäller O.; Dhamotharan S.; Geweniger C.; Graefe G.; Hanke P.; Hansper G.; Hepp V.; Kluge E.; Putzer A.; Sommer J.; Tittel K.; Werner S.; Wunsch M.; Beuselinck R.; Binnie D.; Cameron W.; Dornan P.; Girone M.; Goodsir S.; Martin E.; Moutoussi A.; Nash J.; Sedgbeer J.; Spagnolo P.; Williams M.; Ghete V.; Girtler P.; Kneringer E.; Kuhn D.; Rudolph G.; Betteridge A.; Bowdery C.; Buck P.; Colrain P.; Crawford G.; Finch A.; Foster F.; Hughes G.; Jones R.; Whelan E.; Williams M.; Giehl I.; Hoffmann C.; Jakobs K.; Kleinknecht K.; Quast G.; Renk B.; Rohne E.; Sander H.; van Gemmeren P.; Zeitnitz C.; Aubert J.; Benchouk C.; Bonissent A.; Bujosa G.; Carr J.; Coyle P.; Diaconu C.; Ealet A.; Fouchez D.; Leroy O.; Motsch F.; Payre P.; Talby M.; Sadouki A.; Thulasidas M.; Tilquin A.; Trabelsi K.; Aleppo M.; Antonelli M.; Ragusa F.; Berlich R.; Blum W.; Büscher V.; Dietl H.; Ganis G.; Gotzhein C.; Kroha H.; Lutjens G.; Lutz G.; Mannert C.; Manner W.; Moser H.; Richter R.; Rosado-Schlosser A.; Schael S.; Settles R.; Seywerd H.; Stenzel H.; Wiedenmann W.; Wolf G.; Boucrot J.; Callot O.; Chen S.; Davier M.; Duflot L.; Grivaz J.; Heusse P.; Hücker A.; Jacholkowska A.; Kado M.; Kim D.; Le Diberder F.; Lefrancois J.; Lutz A.; Schune M.; Serin L.; Tournefier E.; Veillet J.; Videau I.; Zerwas D.; Azzurri P.; Bagliesi G.; Bettarini S.; Bozzi C.; Calderini G.; Dell'Orso R.; Fantechi R.; Ferrante I.; Giassi A.; Gregorio A.; Ligabue F.; Lusiani A.; Marrocchesi P.; Messineo A.; Palla F.; Rizzo G.; Sanguinetti G.; Sciabà A.; Sguazzoni G.; Steinberger J.; Tenchini R.; Vannini C.; Venturi A.; Verdini P.; Blair G.; Bryant L.; Chambers J.; Coles J.; Green M.; Medcalf T.; Perrodo P.; Strong J.; von Wimmersperg-Toeller J.; Botterill D.; Clifft R.; Edgecock T.; Haywood S.; Maley P.; Norton P.; Thompson J.; Wright A.; Bloch-Devaux B.; Colas P.; Fabbro B.; Faif G.; Lançon E.; Lemaire M.; Locci E.; Perez P.; Przysiezniak H.; Rander J.; Renardy J.; Rosowsky A.; Roussarie A.; Trabelsi A.; Vallage B.; Black S.; Dann J.; Kim H.; Konstantinidis N.; Litke A.; McNeil M.; Taylor G.; Booth C.; Brew C.; Cartwright S.; Combley F.; Kelly M.; Lehto M.; Reeve J.; Thompson L.; Affholderbach K.; Böhrer A.; Brandt S.; Cowan G.; Foss J.; Grupen C.; Smolik L.; Stephan F.; Apollonio M.; Bosisio L.; della Marina R.; Giannini G.; Gobbo B.; Musolino G.; Putz J.; Rothberg J.; Wasserbaech S.; Williams R.; Armstrong S.; Charles E.; Elmer P.; Ferguson D.; Gao Y.; Gonzalez S.; Greening T.; Hayes O.; Hu H.; Jin S.; McNamara P.; Nachtman J.; Nielsen J.; Orejudos W.; Pan Y.; Saadi Y.; Scott I.; Walsh J.; Sau Lan W.; Wu X.; Yamartino J.; Zobernig G.; Scott I.; Saadi Y.; Sau Lan W.; Walsh J.; Yamartino J.; Wu X.; Zobernig G.; Pan Y.; Barate R.</p
Search for supersymmetry with a dominant R-parity violating LQD̄ coupling in e+e- collisions at centre-of-mass energies of 130 GeV to 172 GeV
No full textcomplete author list: Barate R.; Buskulic D.; Decamp D.; Ghez P.; Goy C.; Jezequel S.; Lees J.; Lucotte A.; Martin F.; Merle E.; Minard M.; Nief J.; Perrodo P.; Pietrzyk B.; Alemany R.; Casado M.; Chmeissani M.; Crespo J.; Delfino M.; Fernandez E.; Fernandez-Bosman M.; Garrido L.; Graugès E.; Juste A.; Martinez M.; Merino G.; Miqnel R.; Mir L.; Morawitz P.; Pacheco A.; Park I.; Pascual A.; Riu I.; Sanchez F.; Colaleo A.; Creanza D.; De Palma M.; Gelao G.; Iaselli G.; Maggi G.; Maggi M.; Nuzzo S.; Ranieri A.; Raso G.; Ruggieri F.; Selvaggi G.; Silvestris L.; Tempesta P.; Tricomi A.; Zito G.; Huang X.; Lin J.; Quyang Q.; Wang T.; Xie Y.; Xu R.; Xue S.; Zhang J.; Zhang L.; Zhao W.; Abbaneo D.; Becker U.; Boix G.; Cattaneo M.; Cerutti F.; Ciulli V.; Dissertori G.; Drevermann H.; Forty R.; Frank M.; Gianotti F.; Hagelberg R.; Halley A.; Hansen J.; Harvey J.; Janot P.; Jost B.; Lehraus I.; Leroy O.; Loomis C.; Maley P.; Mato P.; Minten A.; Moneta L.; Moutoussi A.; Ranjard F.; Rolandi L.; Rousseau D.; Schlatter D.; Schmitt M.; Schneider O.; Tejessy W.; Teubert F.; Tomalin I.; Tournefier E.; Vreeswijk M.; Wachsmuth H.; Ajaltouni Z.; Badaud F.; Chazelle G.; Deschamps O.; Dessagne S.; Falvard A.; Ferdi C.; Gay P.; Guicheney C.; Henrard P.; Jousset J.; Michel B.; Monteil S.; Montret J.; Pallin D.; Perret P.; Podlyski F.; Hansen J.; Hansen J.; Hansen P.; Nilsson B.; Rensch B.; Wäänänen A.; Daskalakis G.; Kyriakis A.; Markou C.; Simopoulou E.; Vayaki A.; Blondel A.; Brient J.; Machefert F.; Rougé A.; Rumpf M.; Tanaka R.; Valassi A.; Videau H.; Focardi E.; Parrini G.; Zachariadou K.; Cavanaugh R.; Corden M.; Georgiopoulos C.; Huehn T.; Jaffe D.; Antonelli A.; Bencivenni G.; Bologna G.; Bossi F.; Campana P.; Capon G.; Chiarella V.; Laurelli P.; Mannocchi G.; Murtas F.; Murtas G.; Passalacqua L.; Pepe-Altarelli M.; Chalmers M.; Curtis L.; Lynch J.; Negus P.; O'Shea V.; Raine C.; Scarr J.; Teixeira-Dias P.; Thompson A.; Thomson E.; Ward J.; Buchmüller O.; Dhamotharan S.; Geweniger C.; Hanke P.; Hansper G.; Hepp V.; Kluge E.; Putzer A.; Sommer J.; Tittel K.; Werner S.; Wunsch M.; Beuselinck R.; Binnie D.; Cameron W.; Dornan P.; Girone M.; Goodsir S.; Marinelli N.; Martin E.; Nash J.; Sedgbeer J.; Spagnolo P.; Williams M.; Ghete V.; Girtler P.; Kneringer E.; Kuhn D.; Rudolph G.; Betteridge A.; Bowdery C.; Buck P.; Colrain P.; Crawford G.; Ellis G.; Finch A.; Foster F.; Hughes G.; Jones R.; Robertson N.; Williams M.; van Gemmeren P.; Giehl I.; Hoffmann C.; Jakobs K.; Kleinknecht K.; Kröcker M.; Nürnberger H.; Quast G.; Renk B.; Rohne E.; Sander H.; Schmeling S.; Zeitnitz C.; Ziegler T.; Aubert J.; Benchouk C.; Bonissent A.; Carr J.; Coyle P.; Ealet A.; Fouchez D.; Motsch F.; Payre P.; Talby M.; Thulasidas M.; Tilquin A.; Aleppo M.; Antonelli M.; Ragusa F.; Berlich R.; Büscher V.; Dietl H.; Ganis G.; Hüttmann K.; Lütjens G.; Mannert C.; Männer W.; Moser H.; Schael S.; Settles R.; Seywerd H.; Stenzel H.; Wiedenmann W.; Wolf G.; Boucrot J.; Callot O.; Chen S.; Davier M.; Duflot L.; Grivaz J.; Heusse P.; H¨ocker A.; Jacholkowska A.; Kado M.; Kim D.; Le Diberder F.; Lefrançois J.; Serin L.; Veillet J.; Videau I.; de Vivie de Régie J.; Zerwas D.; Azzurri P.; Bagliesi G.; Bettarini S.; Boccali T.; Bozzi C.; Calderini G.; Dell'Orso R.; Fantechi R.; Ferrante I.; Giassi A.; Gregorio A.; Ligabue F.; Lusiani A.; Marrocchesi P.; Messineo A.; Palla F.; Rizzo G.; Sanguinetti G.; Sciab`a A.; Sguazzoni G.; Tenchini R.; Vannini C.; Venturi A.; Verdini P.; Blair G.; Chambers J.; Coles J.; Cowan G.; Green M.; Medcalf T.; Strong J.; von Wimmersperg-Toeller J.; Botterill D.; Clifft R.; Edgecock T.; Norton P.; Thompson J.; Wright A.; Bloch-Devaux B.; Colas P.; Fabbro B.; Faif G.; Lançon E.; Lemaire M.; Locci E.; Perez P.; Przysiezniak H.; Rander J.; Renardy J.; Rosowsky A.; Trabelsi A.; Tuchming B.; Vallage B.; Black S.; Dann J.; Kim H.; Konstantinidis N.; Litke A.; McNeil M.; Taylor G.; Booth C.; Cartwright S.; Combley F.; Kelly M.; Lehto M.; Thompson L.; Affholderbach K.; Böohrer A.; Brandt S.; Foss J.; Grupen C.; Prange G.; Smolik L.; Stephan F.; Giannini G.; Gobbo B.; Putz J.; Rothberg J.; Wasserbaech S.; Williams R.; Armstrong S.; Charles E.; Elmer P.; Ferguson D.; Gao Y.; González S.; Greening T.; Hayes O.; Hu H.; Jin S.; McNamara P.; Nachtman J.; Nielsen J.; Orejudos W.; Pan Y.; Saadi Y.; Scott I.; Walsh J.; Wu S.; Wu X.; Zobernig G.; Barate R.; Buskulic D.; Zobernig G.; Pan Y.; Saadi Y.; Nielsen J.; Orejudos W.; Wu S.; Wu X.; Scott I.; Walsh J.; Hayes O.; Greening T.; González S.; Gao Y.; Nachtman J.; McNamara P.; Jin S.; Hu H.; Ferguson D.; Elmer P.; Charles E.; Barate R.</p
The quality of business service offer SIA Lursoft it.
No full textBakalaura darbs ‘’Klientu apkalpošanas kvalitāte SIA Lursoft IT’’ sastāv no 5. nodaļām, no kurām pirmajā nodaļā ir apskatīti apkalpošanas pamatprincipi uzņēmumā. Tiek apskatīts jautājums par klientu vajadzību apzināšanu, par kvalitatīvas apkalpošanas priekšnosacījumiem un apkalpošanas kvalitātes uzlabošanu.
Otrajā nodaļā ir izvērtēta klientu apmierinātība, apskatīti apmierinātības modeļi un klientu apmierinātības mērīšana.
Darba trešajā nodaļā autore analizē SIA Lursoft IT piedāvātos produktus un pakalpojumus. Autore apraksta kvalitatīva produkta un pakalpojuma raksturojumu un pilnveidošanas nepieciešamību.
Bakalaura ceturtajā nodaļā autore analizē SIA Lursoft IT produktu un pakalpojumu pilnveidošanas iespējas, apskatīts kvalitatīva produkta un pakalpojuma nozīme jaunu klientu piesaistīšanai un esošo klientu saglabāšanai. Autore apraksta kā kvalitatīvu produktu un pakalpojumu izstrādāšana un piedāvāšana varētu veicināt uzņēmuma klientu loku un tirgus paplašināšanu.
Bakalaura pēdējā, piektajā nodaļā, autore sniedz ieskatu SIA Lursoft IT sasniegtajā un nākotnes perspektīvās produktu un pakalpojumu kvalitātes uzlabošanā, analizē un parāda sasniegto un nākotnes vīzijas.Bachelors’ paper “The quality of business service offer SIA Lursoft IT’’ consists of faif parts from which in the first part the author introduces with offered products and services from Lursoft IT, Ltd. what gives characterization for importance of qualitative products and services, and its general understandings in fundamental rules of the enterprise.
The second part introduces the way in which qualitative product comes to the customers. There are seen problems and ways how to eliminate and solve them.
Third part of the bachelors’ paper is the analysis of possibility to improve Lursoft IT, Ltd. products and services. As well as to see the importance of qualitative products and services in enchaining new customers and keeping existent. The author describes how to conduce the clientele and market boarding by developing and offering qualitative product and service.
In the fourth chapter there are examined basic principles in making service in enterprise. The question is examined about how to know the customer needs, preconditions for qualitative service, and improvements for servicing customers.
Bachelors last part the author gives inside to Lursoft IT, Ltd. future visions as well as to already reached plans for improving quality of products and services
Search for the standard model Higgs boson at the LEP-2 collider near S**(1/2) = 183-GeV
No full textDuring 1997 the ALEPH experiment at LEP gathered 57 \pb of data at centre-of-mass energies near 183 ~\G. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction \ee\r\H\Z. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: \mH > 87.9 \Gcs at 95\% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57 pb −1 of data at centre-of-mass energies near 183 GeV . These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e + e − →HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m H >87.9 GeV /c 2 at 95% confidence level.During 1997 the ALEPH experiment at LEP gathered 57 pb −1 of data at centre-of-mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e + e − →HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m H >87.9 GeV /c 2 at 95% confidence level
Measurement of W pair production in e+ e- collisions at 189-GeV
No full textThe production of W-pairs is analysed in a data samplecollected by ALEPH at a mean centre-of-mass energy of 188.6 GeV,corresponding to an integrated luminosity of 174.2 pb^-1. Crosssections are given for different topologies of W decays intoleptons or hadrons. Combining all final states and assumingStandard Model branching fractions, the total W-pair cross sectionis measured to be 15.71 +- 0.34 (stat) +- 0.18 (syst) pb.Using also the W-pair data samples collected by ALEPH at lowercentre-of-mass energies, the decay branching fraction of the W bosoninto hadrons is measured to be BR (W > hadrons) = 66.97+- 0.65 (stat) +- 0.32 (syst) %, allowing a determination of theCKM matrix element |V(cs)|= 0.951 +- 0.030 (stat) +- 0.015 (syst).The production of W + W − pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb −1 . Cross sections are given for different topologies of W decays into leptons or hadrons. Combining all final states and assuming Standard Model branching fractions, the total W-pair cross section is measured to be 15.71±0.34 (stat.) ±0.18 (syst.) pb . Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching fraction of the W boson into hadrons is measured to be B(W→hadrons)=66.97±0.65(stat.)±0.32(syst.)%, allowing a determination of the CKM matrix element | V cs |=0.951±0.030(stat.)±0.015(syst.).The production of W-pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb^-1. Cross sections are given for different topologies of W decays into leptons or hadrons. Combining all final states and assuming Standard Model branching fractions, the total W-pair cross section is measured to be 15.71 +- 0.34 (stat) +- 0.18 (syst) pb. Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching fraction of the W boson into hadrons is measured to be BR (W > hadrons) = 66.97 +- 0.65 (stat) +- 0.32 (syst) %, allowing a determination of the CKM matrix element |V(cs)|= 0.951 +- 0.030 (stat) +- 0.015 (syst)
Measurement of the W mass and width in e+ e- collisions at 189-GeV
No full textThe mass of the W boson is determined in e + e − collisions at LEP by the direct reconstruction of W decays in WW→qq¯qq¯ and WW→ℓνqq¯ events, supplemented by measurements using the kinematic properties of the leptons in the \mathrm{W}\mathrm{W}\rightarrow\mbox{\ell\nu }\mbox{} decay channel. The main sample of W pairs is selected from an integrated luminosity of 174 pb −1 collected with the ALEPH detector in 1998 at a centre-of-mass energy of 188.63 GeV. The combined result from all channels is mW=80.432±0.072(stat.)±0.041(syst.)±0.019(FSI)±0.017(LEP)GeV/c2, where FSI represents the possible effects of final state interactions in the qq¯qq¯ channel. In a second two-parameter fit to the qq¯qq¯ , \mathrmeνqq¯ and μνqq¯ channels, where the W mass and width are decoupled, the average W width is found to be { 2.24±0.20(stat.)±0.13(syst.) GeV/ c2 }, consistent with the Standard Model prediction. The combination of the mass measurement presented in this paper together with those derived previously from the W pair cross section at 161 and 172 GeV and direct reconstruction at 172 and 183 GeV gives mW=80.418±0.061(stat.)±0.040(syst.)±0.019(FSI)±0.017(LEP)GeV/c2
Search for a scalar top almost degenerate with the lightest neutralino in e+ e- collisions at s**(1/2) up to 202-GeV
No full textData collected at centre-of-mass energies from 189 GeV to 202 GeV by the ALEPH detector at LEP, corresponding to an integrated luminosity of 411 pb-1, are analysed in a search for the scalar top in the decay channels 'stop -> c/u neutralino' for small mass differences between the stop and the lightest neutralino. No evidence for deviations from the Standard Model expectation is found and a lower limit of 59 GeV/c**2 is set for the stop mass, independent of the stop to neutralino mass difference and of the stop lifetime
Search for gamma gamma decays of a Higgs boson produced in association with a fermion pair in e+ e- collisions at LEP
No full textA search for gamma-gamma decays of a Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb-1 at centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e+e- -> Hff, with ff=nu\nu, e+e-, mu+mu-, tau+tau- or qq. Twenty-two events are selected in the data, while 28 events are expected from standard model processes. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e+e- -> Hff cross section and the H -> gamma-gamma branching fraction. In particular, a fermiophobic Higgs boson produced with the standard model cross section is excluded at 95% confidence level for all masses below $100.7 GeV.A search for γγ decays of a Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb −1 at centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e + e − →Hf f ̄ , with f f ̄ =ν ν ̄ , e + e − ,μ + μ − ,τ + τ − or q q ̄ . Twenty-two events are selected in the data, while 28 events are expected from standard model processes. An upper limit is derived, as a function of the Higgs boson mass, on the product of the e + e − →Hf f ̄ cross section and the H→γγ branching fraction. In particular, a fermiophobic Higgs boson produced with the standard model cross section is excluded at 95% confidence level for all masses below 100.7 GeV /c 2 .A serach for gamma gamma decays of Higgs boson is performed in the data sample collected at LEP with the ALEPH detector between 1991 and 1999. This corresponds to an integrated luminosity of 672 pb-1 centre-of-mass energies ranging from 88 to 202 GeV. The search is based on topologies arising from a Higgs boson produced in association with a fermion pair via the Higgs-strahlung process e+e- -> Hffbar, with ffbar = nunubar, e+e-, mu+mu-, tau+tau- or qqbar... (CERN
- …
